Notation

The Play Note () for () Beats can sometimes be tricky to get used to since the notes and rhythms are notated with numbers, unlike sheet music. These diagrams may help:

Notes

The note names are written on the keys. Notes written in the two most common clefs (Treble clef and Bass clef) are connected to the piano. All notes can be written in an infinite number of ways. The most common enharmonic notes are included. A line going from a long red box means the notes go to the same key on the piano. Even though the drop-down keyboard shows only two octaves of notes (48 to 72), a number can be put in manually to get any note. To change octaves, simply add or subtract 12.

There are 128 notes on the MIDI keyboard, numbered from 0 (C-1, about 8.18 Hz) to 127 (G9, 12500 Hz). Each note is 1 higher than the previous, and the ratio of frequency is always 12√2 (approximately 1.06), with A4 being 440 Hz.

Clef

Note

MIDI number

Frequency

Bass

C3

48

131 Hz

C♯3/D♭3

49

139 Hz

D3

50

147 Hz

D♯3/E♭3

51

156 Hz

E3

52

165 Hz

F3

53

175 Hz

F♯3/G♭3

54

185 Hz

G3

55

196 Hz

G♯3/A♭3

56

208 Hz

A3

57

220 Hz

A♯3/B♭3

58

233 Hz

B3

59

247 Hz

Base and Treble

C4 (middle C)

60

262 Hz

Treble

C♯4/D♭4

61

277 Hz

D4

62

294 Hz

D♯4/E♭4

63

311 Hz

E4

64

330 Hz

F4

65

349 Hz

F♯4/G♭4

66

370 Hz

G4

67

392 Hz

G♯4/A♭4

68

415 Hz

A4

69

440 Hz

A♯4/B♭4

70

466 Hz

B4

71

494 Hz

C5

72

523 Hz

Beats

This table shows the beat number values for the most common rhythms in the most common time signatures, interpreted in the most basic way.